Scientists Compared Scottish DNA to Irish DNA — One Has Viking Blood, the Other Doesn't

Scientists Compared Scottish DNA to Irish DNA — One Has Viking Blood, the Other Doesn't

The Scottish and the Irish look like the same people — but they're not.
Scientists at the University of Edinburgh compared their DNA and found
a massive difference. One of them carries up to 44% Viking blood. The
other almost none. Backed by groundbreaking studies published in PNAS
and Nature analyzing thousands of genomes, this is the real genetic
difference between two brother nations — and the answer will surprise
you.